Multicomponent cartridge
A multicomponent cartridge, particularly a two-component cartridge, contains a coaxial outlet with an outer outlet tube and an inner outlet tube concentric to the outer tube. A cap detachably connected to the coaxial outlet. A seal with at least one seal flange is arranged on the cap for contact on the inner and/or outer outlet tube. A simplified and improved seal is thus enabled, such that the seal includes at least one laterally projecting sealing edge, which extends around the inner and/or outer side of the inner and/or outer outlet tube of the coaxial outlet and/or on the side of the one or more seal flanges facing the outer and/or inner side of the inner and/or outer outlet tube.
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1. Field of the Invention
The invention relates to a novel multicomponent cartridge, especially a two-component cartridge.
2. Prior Art
Such cartridges are used, e.g., for preserving and storing multicomponent adhesives, curing sealants, resins, or the like. The components are first mixed when squeezed out of the cartridge into a separate static mixer, which is set on the cartridge. Typical multicomponent cartridges have separate material receptacles and a material outlet with a seal that can be removed before use. This seal is removed first before emptying the cartridge and can be configured, e.g., as a screw cap, a tear-off seal, or the like. The material receptacles for such cartridges lie either side by side (side-by-side cartridge) or are configured as coaxial tubes (coaxial cartridge). In either embodiment, the material outlet can be configured as a coaxial outlet. In this way, the first component is discharged through a central tube and the other component is discharged through an annular space arranged around the central tube. Such coaxial outlets are sealed with caps, which have special sealing elements. The sealing elements should prevent the components stored in the cartridge from leaking during storage or from reacting with each other due to premature contact. Thus, a seal against the outside and a seal against the inside should be realized.
Cartridges are already known in which the seal between the cap and a coaxial outlet is realized by a planar arrangement of an inner and/or outer tube of the coaxial outlet inside of suitable annular grooves of the cap or by a wedge configuration. Here, the seal is realized on the end or on the side as a surface seal, on the side by a wedge configuration, or by a combination of these variants.
There are already caps for cartridges with coaxial outlet, for which the seal is realized by an additional elastomer insert. However, this solution is expensive because an additional elastomer part must be produced and mounted in the cap or it must be produced using complicated 2K plastic injection technology.
SUMMARY OF THE INVENTIONThe task of the invention is to create a multicomponent cartridge of the type mentioned in the introduction, which enables a simplified and improved seal.
This task is realized by a novel multicomponent cartridge with the features of the invention as described hereinafter. Preferred configurations and advantageous refinements of the invention are the objects of the invention.
The seal of the cartridge according to the invention is realized between the cap and the coaxial outlet by means of circular, lateral sealing edges. These are formed on the outlet tubes of the coaxial outlet and/or on the seal flanges or sealing elements of the cap. The seal is thus realized across a precisely defined and limited contact surface, so that a high surface pressure is produced on a small surface and therefore a higher sealing pressure is enabled. Because the seal acts laterally, excess tightening of the cap in the case of a screw cap is not necessary. Because the sealing edges lead to lateral contact at the corresponding counter-surfaces, a high sealing effect is also achieved without a great axial tightening force. If the cap is configured, e.g., as a screw cap, the seal itself then remains guaranteed when the cap is not completely screwed on. As long as the sealing edges contact the corresponding counter-surfaces, the seal remains guaranteed.
Preferably, the sealing edges are pre-tensioned in the radial direction. Therefore, the contact pressure can be increased. In a preferred configuration, seal flanges surrounding the outlet tubes are provided on the two sides of both outlet tubes. In this way, the sealing edges can be formed on the seal flanges, on the outlet tubes, or on both. However, merely a one-sided seal can also suffice. The sealing edges can be formed or set back on the ends of the seal flanges and/or outlet tubes. To guarantee a seal, one sealing edge can be sufficient. However, several sealing edges can also be provided. The sealing edge can be configured, e.g., with sharp edges or can be provided with strong or weak rounding. Other suitable shapes are also possible. In addition to the lateral seal with the sealing edges, an end-side seal can still also be achieved if the top edge surfaces of the outlet tube lead to contact at suitable counter-surfaces of the cap.
BRIEF DESCRIPTION OF THE DRAWINGSOther details and advantages of the invention result from the following description of preferred embodiments with reference to the drawing. Shown are:
As can be gathered especially from
The cap 10 shown in
In
The configuration of the seal between the cap and the coaxial outlets of the corresponding cartridges is explained in the following with reference to several embodiments shown in
For the embodiments shown in
Different embodiments for the sealing edges provided on the inner and/or outer outlet tube are shown in
As can be gathered from
In
Various configurations of the sealing edge 16 or 17 are shown in
In this embodiment, the cap is configured as a molded sealing cap 210. Here, only sealing of the inner outlet tube 205 is necessary. The sealing cap also contains seal flanges 213a and 213b, which define an annular groove for the inner outlet tube 205. There, the seal corresponding to the previously described embodiments can also be configured between the sealing cap and the inner outlet tube 205. The outer outlet tube 204 is connected integrally to the sealing cap 210, wherein the sealing cap 201 can be opened by tearing or also by separation according to the configuration.
The invention is not limited to the previously described embodiments. In particular, any combination of the sealing configurations described individually and shown in the figures can be provided.
Claims
1. Multicomponent cartridge, especially two-component cartridge, comprising a coaxial outlet defined by an outer outlet tube and an inner outlet tube concentric to the outer outlet tube; a cap detachably connected to the coaxial outlet; a seal with at least one seal flange arranged on the cap for contact to at least one of the inner and outer outlet tube; the seal including at least one sealing edge, which projects to the side and extends around at least one of the inner and outer side of the at least one of the inner and outer outlet tube of the coaxial outlet, and/or on the side of the one or more seal flanges facing at least one of the outer and inner side of the at least one of the inner and outer outlet tube.
2. Multicomponent cartridge according to claim 1, characterized in that the cap contains at least one seal flange with one or more sealing edges for at least one of the outer and inner tube.
3. Multicomponent cartridge according to claim 1, characterized in that the cap contains two seal flanges defining an annular groove for at least one of the inner and outer outlet tube.
4. Multicomponent cartridge according to claim 3, characterized in that one or more sealing edges are arranged on the seal flanges defining the annular groove.
5. Multicomponent cartridge according to claim 1, characterized in that the seal contains at least one circular sealing edge on the at least on of the inner and outer outlet tube.
6. Multicomponent cartridge according to claim 1, characterized in that the sealing edge is configured with a sharp edge.
7. Multicomponent cartridge according to claim 1, characterized in that the sealing edge is rounded.
8. Multicomponent cartridge according to claim 1, characterized in that the one or more sealing edges are pre-tensioned in the radial direction.
9. Multicomponent cartridge according to claim 1, characterized in that the cap is connected by a screw connection to the coaxial outlet.
10. Multicomponent cartridge according to claim 1, characterized in that the cap is connected by a tear-away connection to the coaxial outlet.
Type: Application
Filed: Jul 14, 2004
Publication Date: Mar 10, 2005
Patent Grant number: 7306126
Applicant: SULZER CHEMTECH AG (WINTERTHUR)
Inventor: Nikolaus Brugner (Ziemetshausen)
Application Number: 10/891,412